The research  group led by Rie Miura, a graduate student at the University of Tokyo  has found evidences of sequential star formation induced by the  expansion of a super-giant HII region. The group observed the  super-giant HII region called NGC 604 in the Triangulum Galaxy (also  known as Messier 33) with the millimeter interferometer of the Nobeyama  Radio Astronomical Observatory, and discovered that the star formation  activity decreases with increasing projected distance from the central  cluster. This is the first time to unveil the process of sequential star  formation in a giant extragalactic HII region. The group is going to  investigate star formation in the giant HII region with ALMA that allows  celestial observations at much higher resolution and sensitivity.  Please visit http://alma.mtk.nao.ac.jp/~miura/index-e.html for more detailed information.

http://alma.mtk.nao.ac.jp/e/news/alma/2010/1102sequential_star_formation_induced_by_the_expansion_of_the_super-giant.html